We
had one yesterday... (Well, technically it was today for EST, and both today and yesterday for CST, but WHO CARES?!)
The most people in at once being six people (or maybe seven).
The total amount of people that came over the time of the party was around 8-10 or so.
But it's a start...
The only way to get more people is if all of us spread the news, and get people to party! (That, or if/when Kevin decides to help us by doing some sort of announcement/in-game alert.)